System Information Updates In LTE

• US 20120327848A1
• Filed: 12/22/2011
• Published: 12/27/2012
• Est. Priority Date: 10/29/2007
• Status: Abandoned Application

• Current Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Somasundaram, Shankar, Pasad, Kalpendu R., Wang, Jin
• Application Number:
  US13/334,893
• Publication Number:
  US 20120327848A1
• Time in Patent Office: Days
• US Class Current: 370/328
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information

Abstract

A method and apparatus for receiving system information updates includes a wireless transmit receive unit (WTRU) receiving a system frame number. The WTRU also receives system information messages in a modification period. The modification period has a boundary determined by the system frame number. The WTRU receives system information change notification after a first modification change boundary and determines that the system information is valid until a second modification change boundary.

Claims

1. A method comprising:

obtaining a system frame number, SFN;

obtaining an integer value “

n”

;

determining, based on the SFN and the integer value, a modification period boundary; and

maintaining current system information as valid until receiving new system information after the modification period boundary.

2. The method of claim 1, wherein determining the modification period boundary comprises determining the modification period boundary according to a modulus operation based on the SFN and “

n.”

3. The method of claim 1, wherein the integer value is configured by system information.

4. The method of claim 1, further comprising calculating the integer value based on a predefined formula.

6. The WTRU of claim 1, wherein the processor is further configured to determine the modification period boundary according to a modulus operation based on the SFN and “

n.”

7. The WTRU of claim 1, wherein the integer value is configured by system information.

8. The WTRU of claim 1, further comprising calculating the integer value based on a predefined formula.

5. A wireless transmit receive unit (WTRU) comprising:

a processor configured to obtain a system frame number (SFN) and an integer value “

n”

, to determine, based on the system frame number and the integer value, a modification period boundary; and

to maintain current system information as valid until the modification period boundary.